Today computers are thin, light, and fast. They can do pretty much all you would want them to do and you don't have to code them yourself to do something on them.
2000
Computers in 2000 are not as big as the ones in 1950 or 1900 but they are still big. If you were to use one of these computers today you would be sitting at the chair for hours because it is so slow. The computers in 2000 ran windows 95 and lower.
1950
Computers in 1950 were huge. The Eniac was 27 tons and covered 1800 square feet. There are computers still like this but they much much more powerful.